I've tried to fix it:
changeset/35310322

Please review:
I've changed the invalid highway tag.
changeset/35310252

see
changeset/35310152

Please review my changes:
changeset/35309955

ok, thanks for the feedback :-)

please review:
I've changed the invalid tag
highway=residential;unclassified to unclassified
changeset/35309467

please review:
I've changed the invalid tag
highway=track;unclassified to
highway=unclassified
way/378865888

I've changed it to highway=path

please review:
your change produced an invalid tag
highway=footway;steps
I've changed it to footway, but
if the first segment was correctly
tagged as steps, please split the way again or ask me to help you with that.

thanks for the feedback, and sorry, I am not a local, just noticed the unusual tag in Taginfo
http://taginfo.openstreetmap.org/keys/highway

I've changed it to highway=tertiary,
no idea about the ref tag.
changeset/35303271

OK, thanks for the feedback :-)

Please review:
I've changed the invalid tag highway=service;secondary
changeset/35303132

please review:
I've changed the invalid tag
highway=footway;path and the name
changeset/35303089

please review:
I've changed the invalid tag
highway=tertiary;unclassified
to
highway=unclassified
changeset/35303043

please review:
what is meant with
highway=gi# ?
node/579036516

please review:
What is meant with
highway=clothes ?

node/2607514158,
node/3833597900,
node/2607515924

What did you try to map here ?
node/3818297172

please review:
node/3833803763
I guess you want to map a named junction,
so I've changed highway=* to highway=junction. See also
highway=traffic_signals

please review:
I've changed an invalid highway tag:
changeset/35302202